Your vessel has anchored in a channel known to have strong tidal currents. To check your position you take a round of bearings，one of which is a range in line. One hour later the bearing on the lights in range opens up. This indicates the ship is（）.

单项选择题The length of chain between the anchor and the end of the pendant line is called the（）.

A.pigtail chain
B.thrash chain
C.crown chain
D.wear chain

单项选择题The most doubtful and unpredictable factor in a mooring system is the（）.

A.ability of the anchors to hold in a seabed
B.anchor chain catenary length
C.variability of the fairlead
D.angle of the flukes

单项选择题Mooring with two bow anchors has which major advantage over anchoring with one bow anchor? （）.

A.The vessel will not reverse direction in a tidal current
B.The radius of the vessel's swing will be shortened
C.A mooring approach may be made from any direction
D.The vessel will not swing with a change in wind

单项选择题In a crossing situation，a vessel fishing must keep out of the way of a vessel which is（）.

A.under sail
B.towing
C.restricted in her ability to maneuver
D.engaged in pilotage duty

单项选择题A mooring line is described as being 6x24，1-3 4 inch wire rope. What do the above numbersrefer to?（）

A.Strands，yarns，circumference
B.Strands，wires，diameter
C.Wires，yarns，diameter
D.Strands，circumference，wires